Owners, buyers, maintenance technicians, brokers, and insurers routinely confront the same core uncertainty in aircraft management: “When did this change?” Whether it is a subtle paint defect, a minor dent, evidence of a skin repair, progressive corrosion, a fluid stain, or signs of a hard landing, the immediate issue is rarely the detection of the condition itself. Modern inspection techniques, from visual checks to advanced non-destructive testing, are generally effective a
